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January 11th, 2026 :: 8:30 am CST   

Local Weather Report for
Decatur
Illinois, United States

 Current Decatur Weather Conditions Updated January 11th at 6:54 am 
Overcast
Temperature:23°F Dew Point:16°F
Barometer:30.36 inHg Wind:N 43 Mph
Humidity:73.0% Visibility:0M
 
 Decatur Weather Forecast Summary  
 
Today
Jan 11th
Monday
Jan 12th
Tuesday
Jan 13th
Wednesday
Jan 14th
Thursday
Jan 15th
Cloudy Cloudy Mix of rain and snow Cloudy Cloudy
34°F
44°F
29°F
52°F
36°F
42°F
20°F
27°F
17°F
 
 Decatur Detailed Weather Forecast  
 
Sunday, January 11th, 2026
Morning Temperature: 30°F
Sunny. Windy.
Afternoon Temperature: 28°F
Mostly sunny.
Evening Temperature: 29°F
Clear. Windy at times.
Monday, January 12th, 2026
Overnight Temperature: 30°F
Clear with cloudy periods. Windy at times.
Morning Temperature: 39°F
Cloudy. Windy at times.
Afternoon Temperature: 38°F
Cloudy.
Evening Temperature: 37°F
Clear.
Tuesday, January 13th, 2026
Overnight Temperature: 38°F
Cloudy. Windy at times.
Morning Temperature: 46°F
Cloudy. Windy.
Afternoon Temperature: 49°F
Cloudy. Windy at times.
Evening Temperature: 45°F
Cloudy with a few showers. Windy at times.
Wednesday, January 14th, 2026
Overnight Temperature: 41°F
Cloudy. Windy at times.
Morning Temperature: 33°F
Cloudy. Windy.
Afternoon Temperature: 24°F
Cloudy. Windy.
Evening Temperature: 21°F
A mix of cloudy and clear skies. Windy.
Thursday, January 15th, 2026
Overnight Temperature: 18°F
Clear with cloudy periods. Windy.
Morning Temperature: 23°F
Cloudy. Windy.
Afternoon Temperature: 23°F
Sunny with cloudy periods.
Evening Temperature: 22°F
Cloudy.
Friday, January 16th, 2026
Overnight Temperature: 23°F
Cloudy.
Morning Temperature: 31°F
A mix of cloud and sun. Windy at times.
Afternoon Temperature: 32°F
Cloudy.
Evening Temperature: 33°F
Cloudy. Windy at times.
Saturday, January 17th, 2026
Overnight Temperature: 30°F
A mix of cloudy and clear skies. Windy at times.
Morning Temperature: 33°F
Cloudy. Windy.
Afternoon Temperature: 26°F
Sunny. Windy at times.
Evening Temperature: 23°F
Clear.
Sunday, January 18th, 2026
Overnight Temperature: 22°F
Clear. Windy at times.
Morning Temperature: 32°F
Sunny. Windy at times.
Afternoon Temperature: 30°F
Sunny. Windy at times.
Evening Temperature: 31°F
Clear. Windy at times.
Monday, January 19th, 2026
Overnight Temperature: 29°F
Clear. Windy at times.
Morning Temperature: 33°F
Sunny with cloudy periods. Windy.
Afternoon Temperature: 27°F
Sunny.
Evening Temperature: 25°F
Clear.





 

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6:53 AM  21°F
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This WeatherCity Weather Forecast for Decatur, Illinois, United States is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office

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